HelpForCars.net- All Aobut Automotive Repairs
HelpForCars.net- All Aobut Automotive Repairs

P0193

P0193 - Fuel Rail Pressure Sensor Circuit High Input

Comments |  Add Yours
Possible causes
- Low or no fuel
- Faulty Fuel Rail Pressure Sensor
- Fuel Rail Pressure Sensor harness is open or shorted
- Fuel Rail Pressure Sensor circuit poor electrical connection
- Faulty Fuel Pump
Help with this
Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
- Engine will not start
P0193 Description
The Fuel Rail Pressure (FRP) sensor is a diaphragm strain gauge device in which resistance changes with pressure. The electrical resistance of a strain gauge increases as pressure increases, and the resistance decreases as the pressure decreases. The varying resistance affects the voltage drop across the sensor terminals and provides electrical signal to the Powertrain Control Module (PCM) corresponding to pressure.
Strain gauge type sensors are consider passive sensors. A passive sensor is connected to a voltage divider network so that varying the resistance of the passive sensor causes a variation in total current flow.
Voltage that is dropped across a fixed resistor in series with the sensor resistor determines the voltage signal at the PCM. This voltage signal is equal to the reference voltage minus the voltage drop across the fixed resistor.
The FRP sensor measures the pressure of the fuel near the fuel injectors. This signal is used by the PCM to adjust the fuel injector pulse width and meter fuel to each combustion cylinder.
Need more help?
Need parts?


HelpForCars.net OBD Codes Comments Powered by Disqus
Engine Light ON?

The Engine-Codes.com ELM327 WiFi Car Diagnostic connects to your Android phone, iPhone, iPad, or Windows computer from your vehicle.